1-20chapter stats

60 and after the course the mean score was 13080 the

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Unformatted text preview: esis to test the claim that both sites have the same number of pedestrians. A. µa - µb = 0 B. µa - µb ≠ 0 C. µa - µb > 0 D. µa - µb < 0 1-853 Chapter 01 - An Introduction to Business Statistics 131. A coffee shop franchise owner is looking at two possible locations for a new shop. To help make a decision he looks at the number of pedestrians that go by each of the two locations in one-hour segments. At location A, counts are taken for 35 one-hour units and with a mean number of pedestrians of 421 and a sample standard deviation of 122. At the second location (B), counts are taken for 50 one hour units with a mean number of pedestrians of 347 and a sample standard deviation of 85. Assume the two populations variances are not known but are equal. (pooled variance = 22.4) Testing the claim that both sites have the same mean number of pedestrians at = .01, what do you conclude? A. There is a difference between the two sites B. There is no difference between the two sites 132. In a market research study conducted by a local winery on white wine preference, the following results were found. Of a sample of 500 men, 120 preferred white wine and of a sample of 500 women, 210 preferred white wine. Setup the alternative hypothesis that will test the claim that the percentage of women preferring white wine is 25% higher than men. A. Pw - Pm ≠ .25 B. Pw - Pm > .25 C. Pw - Pm < .25 D. Pw - Pm ≠ 0 133. In a market research study conducted by a local winery on white wine preference, the following results were found. Of a sample of 500 men, 120 preferred white wine and of a sample of 500 women, 210 preferred white wine. Calculate the test statistic for testing the claim that women are 25% higher than men on preference for white wine. A. 6.167 B. -82.16 C. -2.397 D. -.07 134. In a market research study conducted by a local winery on white wine preference, the following results were found. Of a sample of 500 men, 120 preferred white wine and of a sample of 500 women, 210 preferred white wine. What do you conclude at α = .05 about the claim that women are 25% higher than men on preference for white wine? A. Reject the null hypothesis B. Cannot reject the null hypothesis 1-854 Chapter 01 - An Introduction to Business Statistics 135. The registrar at a state college is interested in determining whether there is a difference of more than one credit hour between male and female students in the average number of credit hours taken during a term. She selected a random sample of 60 male and 60 female students and observed the following sample information. Setup the alternative hypothesis to test the claim. A. µf - µm ≠ 0 B. µf - µm ≠ 1 C. µf - µm > 1 D. µf - µm < 1 136. The registrar at a state college is interested in determining whether there is a difference of more than one credit hour between male and female students in the average number of credit hours taken during a term. She selected a random sample of 60 male and 60 female students and observed the following sample information. Calculate the test statistic to be used in the analysis. A. 5.67 B. 2.05 C. 1.73 D. 6.71 1-855 Chapter 01 - An Introduction to Business Statistics 137. The registrar at a state college is interested in determining whether there is a difference of more than one credit hour between male and female students in the average number of credit hours taken during a term. She selected a random sample of 60 male and 60 female students and observed the following sample information. What do you conclude if z = 1.73 at α = .01? A. Reject the null hypothesis B. Don't reject the null hypothesis 138. Suppose that a realtor is interested in comparing the price of midrange homes in two cities in a Midwestern state. She conducts a small survey in the two cities looking at the price of midrange homes. Assume equal population variances. Setup the alternative hypothesis to test the claim that there is a difference in the mean price of midrange homes of the two cities. A. µa - µb = 0 B. µa - µb ≠ 0 C. µa - µb > 0 D. µa - µb < 0 1-856 Chapter 01 - An Introduction to Business Statistics 139. Suppose that a realtor is interested in comparing the price of midrange homes in two cities in a Midwestern state. She conducts a small survey in the two cities looking at the price of midrange homes. Assume equal population variances. Calculate the pooled estimate of σ2 (rounded to nearest hundred) A. 2100 B. 4,335,400 C. 4,932,000 D. 2200 140. Suppose that a realtor is interested in comparing the price of midrange homes in two cities in a Midwestern state. She conducts a small survey in the two cities looking at the price of midrange homes. Assume equal population variances. Test the claim at = .01 where the pooled variance = 4335357.143. A. Can reject the null hypothesis B. Cannot reject the null hypothesis 1-857 Chapter 01 - An Introduction to Business Statistics 141. Suppose that a realtor is interested in comparing the price of midrange homes in two cities in a Midwestern state. She conducts a smal...
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